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Breast lumps in men

Male Breast Lump Biopsy: — What the Result Usually Means

Finding a lump in your breast as a man is frightening. In most cases it is gynaecomastia — an enlargement of normal breast gland tissue — not cancer. The biopsy is done to confirm that with certainty.

Medically reviewed by Dr. C. Raghavendra Reddy, Medical Oncologist, MBBS (Gold Medal) · DNB · DM (Medical Oncology, Gold Medal) · Last reviewed September 2026

  • Almost always benign — Gynaecomastia — gland tissue responding to hormonal change — is behind the large majority of lumps found in men.
  • Male breast cancer is rare — Male breast cancer accounts for a small fraction of all breast cancers, and even fewer of all lumps found in men.
  • Biopsy confirms it — A tissue sample is the only way to be certain. Your team is recommending it to give you a definite answer, not because cancer is expected.
  • One-day procedure — A core needle biopsy is done under local anaesthetic and is usually finished in under 30 minutes.
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A lump in a man's breast is almost always gynaecomastia — an enlargement of normal breast gland tissue, not cancer. Male breast cancer is rare. Your doctor has recommended a biopsy to confirm this, because a tissue sample is the only way to be certain. Most results come back benign.

Words you will hear during this process

Gynaecomastia
Enlargement of breast gland tissue in men, caused by a shift in the balance between oestrogen and testosterone. It is not cancer and is not caused by excess body fat.
Core needle biopsy
A procedure using a hollow needle to take a small cylinder of tissue from the lump. The sample is sent to a laboratory and examined under a microscope to identify exactly what the cells are.
Fine needle aspiration (FNAC)
A simpler sampling method using a very thin needle, sometimes used as a first step. It collects individual cells rather than a tissue core and may not give a complete answer on its own.
Benign
Not cancer. A benign result means the tissue examined is normal or non-cancerous, even if the lump felt alarming.
Male breast cancer
A rare cancer that can occur in men, most commonly in older men with a family history or a BRCA gene variant. It is a small minority of all breast cancers diagnosed.

Is a breast lump in a man usually cancer?

In the large majority of cases, no. Gynaecomastia is the most common reason a man finds a lump or swelling in his chest, and it is entirely benign.

Gynaecomastia happens when oestrogen and testosterone go out of balance. This can occur during puberty, in older age, as a side effect of certain medications, or with some underlying health conditions. It produces real, palpable gland tissue — not simply fat — which is why it feels like a distinct lump rather than diffuse softness.

Male breast cancer does occur, but it is rare. Your oncologist will explain what about your specific lump prompted the referral for biopsy. The biopsy is how they give you a definite answer rather than a probable one.

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Dr. Naresh Gundu
Medical Oncologist

Dr. Naresh Gundu

MBBS, DNB (Internal Medicine), DM (Medical Oncology)

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Dr. C. Raghavendra Reddy
Medical Oncologist

Dr. C. Raghavendra Reddy

MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)

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Dr. Bharati Devi Gorantla
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Dr. Bharati Devi Gorantla

MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)

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Dr. Owais Mohammed
Medical Oncologist

Dr. Owais Mohammed

MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)

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Dr. T. Raghavender Reddy
Medical Oncologist

Dr. T. Raghavender Reddy

MBBS, DM (Medical Oncology), MD (Radiation Oncology)

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Dr. N. Kiranmayee

MBBS, DM (Medical Oncology), MD (Internal Medicine)

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Dr. Muralidhar Muddusetty

MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)

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Dr. Raghavendra Naik

MBBS, MS (General Surgery), M.Ch (Surgical Oncology)

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Dr. Mohammed Imaduddin

M.B.B.S, MS (General Surgery), M.Ch (Surgical Oncology)

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Dr. Vinay Mamidala

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Dr. Kirti Ranjan Mohanty

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What does the biopsy actually involve?

A breast core needle biopsy is a short outpatient procedure done under local anaesthetic. You will feel pressure and possibly a brief sharp sting when the anaesthetic is given, but the biopsy itself should not be painful.

The radiologist or surgeon uses an ultrasound image to guide a hollow needle into the lump and take a small tissue sample. The needle makes a clicking sound when it fires. Most biopsies are finished in under 30 minutes.

You will have a small dressing over the site and can go home the same day. Mild bruising and soreness for a day or two is normal. Results from the laboratory usually take five to seven working days.

Other questions men commonly ask

Why do I need a biopsy if it is probably gynaecomastia?

Because 'probably' is not the same as 'confirmed', and the treatment for gynaecomastia and for breast cancer is entirely different. An ultrasound and clinical examination can strongly suggest which one it is, but they cannot tell you for certain what the cells are. The biopsy gives a definitive tissue answer, which is what both you and your doctor need before deciding whether anything further is required. It is a short procedure done specifically so that you do not have to act on uncertainty.

What causes gynaecomastia?

The most common causes are the normal hormonal shifts of puberty and older age, certain medications — including some heart medicines, antifungals, and medicines for prostate conditions — and conditions that affect hormone levels such as liver disease or thyroid problems. In many men, no single cause is identified. Tell your oncology team everything you take, including supplements and herbal preparations, so they can assess whether medication is a contributing factor.

What happens if the result is gynaecomastia?

A confirmed benign result means no cancer treatment is needed. For most men, no further action is required at all once a definite diagnosis is in. If the lump is large, causing discomfort, or affecting your confidence, your team can discuss whether any treatment for the gynaecomastia itself is appropriate — though this is decided on an individual basis and cosmetic outcomes vary. The important point is that a benign result ends the uncertainty.

When should I be more concerned?

Tell your team if the lump has grown noticeably over a short period, if the skin over it is puckered or thickened, if there is any discharge from the nipple, if the nipple has turned inward, or if you have swelling in the armpit on the same side. These are not certain signs of cancer, but they are reasons to bring your appointment forward rather than wait. If any of these appears after your biopsy and before your results, call your team the same day.

Do I need to stop any medication before the biopsy?

Possibly. If you take blood-thinning medication — including aspirin, warfarin, or newer anticoagulants — tell the team at the time of booking, because you may need to pause it briefly before the procedure to reduce bleeding risk. Do not stop any medication on your own without being told to. Continue all other medicines as normal unless your doctor says otherwise.

Will I need surgery?

For a benign result, almost certainly not. Surgery for gynaecomastia is considered only in specific situations — usually when the lump is large, longstanding, and causing significant discomfort or distress, and when the underlying cause cannot be addressed. If the biopsy confirms cancer, your oncologist will discuss what surgery, if any, is part of the treatment plan. Do not assume surgery is coming before your result is back.

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Common questions

Frequently asked questions

Is gynaecomastia common in men?

Yes, it is very common. It affects men at two peaks — during puberty, when hormones are changing rapidly, and again in older age, when testosterone levels gradually fall. It is also seen in men taking certain medications. Most men with gynaecomastia never need any treatment beyond confirmation of the diagnosis. Finding a lump in your breast as a man does not mean something is seriously wrong.

How rare is male breast cancer?

Male breast cancer is rare. It accounts for a small fraction of all breast cancers diagnosed. The large majority of breast lumps in men turn out to be gynaecomastia or other benign tissue changes. The biopsy is done because it is the only way to be certain — not because cancer is the expected answer. Your oncologist can explain what specifically prompted the referral in your case.

Will the biopsy be painful?

The area is numbed with a local anaesthetic before the biopsy needle is used, so the procedure itself should not be painful. You may feel pressure or a brief sharp sting when the anaesthetic goes in. After it wears off, mild soreness and bruising around the site for a day or two is normal. Most men find the experience much less uncomfortable than they expected. If you have significant pain after you get home, let your team know.

How long will it take to get my results?

The laboratory report usually takes five to seven working days after the biopsy. Your team will tell you at the time how the result will be communicated — whether by a clinic appointment, a phone call, or both. If you have not heard anything after ten working days, it is reasonable to call and follow up. Do not assume no news means a good result; chase it if you are waiting longer than you were told.

Does the biopsy leave a scar?

A core needle biopsy leaves a very small mark at the skin entry point — not a surgical incision, and no stitches are needed. Most men find the mark fades and becomes barely visible over time, though individual healing varies. If you are concerned about the appearance of the site, ask your team at the time of the procedure.

Can I go back to work after the biopsy?

Most men can return to desk-based or light work the same day or the following day. If your work involves heavy lifting or significant physical effort, ask your team how many days to allow before resuming — typically a few days of rest from strenuous activity is advised. Avoid anything that puts repeated pressure on the chest until the soreness has settled, usually within a few days.

Full index

Browse all 701 biopsy topics

Every page in this section, grouped by the part of the journey it belongs to. Pick a group to see what is in it.

What Is a Biopsy?

What Is a Biopsy? Everything You Need to Know →

Types of Biopsy Compared

Which Biopsy Will You Have? Techniques Compared →

Preparing for a Biopsy

What to Expect on the Day of Your Biopsy →

Recovery and Aftercare

After a Biopsy: Recovery, Aftercare and Warning Signs →

Biopsy by Body Part

Biopsy by Body Part: What to Expect at Each Site →

Understanding Your Report

How to Read a Biopsy Report: Terms Explained →

IHC and Molecular Markers

IHC and Molecular Markers on a Biopsy: What They Mean →

Grading and Scoring Systems

Cytology & Prostate Scoring Systems Explained →

How Accurate Is a Biopsy?

How Accurate Is a Biopsy? Errors and Second Opinions →

If Your Result Is Benign

Your Biopsy Is Benign: What It Means and What Comes Next →

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